Sulfurized cotton-dye and process of making same.



FFICE.

' A'IENT LOUIS I-IAAS, OFMANNHEIM, GERMANY, ASSIGNOR TO BADISCHE ANILIN AND SODA FABRIK, OF LUDWVIGSHAFEN-ON-THE-RHINE, GERMANY,

A CORPORATION OF GERMANY.

SULFURIZED COTTON-DYE AND PROCESS OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 718,342, dated January 13, 1903.

Application filed February 11, 1902. Serial No, 93,549. (No specimens.)

To all whom it may concern.-

Be it known that I, LOUIS HAAS, doctor of science and chemist, a citizen of the French Republic, residing at Mannheim,in the Grand.

Duchy of Baden, Germany, have invented new and useful Improvements in Sulfurized Cotton- Coloring Matters and Processes of Making the Same, of which the following is a specification.

Thisinvention relates to sulfurized substantive cotton-colorin g matter which dyes unmordanted cotton shades which are within the range of from yellow to brown and a process for producing the same. I can arrive at this new coloring-matter by treating with sodium sulfid and sulfur the sodium salts of certain nitration products of benzyl sulfonic acid. Among the nitration products which I have found to be useful for the purposes of this my invention are para-mono-nitro-benzylsulfonic acid, the dinitro-benzyl sulfonic acid described by Mohr in AmiaZen der Chem'ie, Vol. 221, page 225, or mixtures of these two substances, the sodium salts of all of which acids or their equivalents I desire to have hereinafter included in the generic .term nitro-benzyl sulfonic substance.

When the above-described dinitro-benzyl sulfonic acid is employed in my process, a coloring-matteris obtained which can produce a brown shade. If the para-mono-nitro-benzyl sulfonicacid be employed, a coloring-mat-- ter is obtained which can produce a yellow shade, and if mixtures of these two acids be employed then the resulting coloring-matter can produce a shade lying within the range of yellow to brown, depending upon the composition of such mixture. The fabric so dyed is not essentially affected in shade when suitably treated in the customary manner with bichromate of potash and acetic acid. When treated with nitrous acid and then with betanaphtholin the manner usual for developing. color upon dyed fiber the shades of the dyed fabric all become more reddish in color.

My new coloring-matters are all of'them distinguished from all hitherto-known coloring-matters which produce similar shades in that when the aqueous solutions are treated at the boiling-point with an excess of hydrochloric acid containing about ten (10) per cent. of that acid (H01) they yield a product which I hereinafter regard as the coloringmatter acid. which coloring-matter acid is not dissolved by a cold ten (10) per cent. aqueous solution of sodium carbonate, and one part of the same is not wholly dissolved within one (1) hour when mixed with ten (10) parts of an aqueous solution of crystallized sodium sulfid, one hundred (100) cubic centimeters of which contain fifty (50) grams of crystallized sodium sulfid, (Na S.9H O.)

In the following example I Will further illus trate the nature of this my invention; but I do not consider my invention as limited to the proportions and other conditions therein set forth. The parts are by weight, and the temperature degrees refer to the centigrade scale. As is customaryin descriptions of this kind, I will hereinafter employ the term sodium sulfid to mean crystallized sodium sulfid, whose chemical formula is accepted generally as Na S.9H O.

EmctmpZePr0duction of coloring matter from lllohrs dinitro-ben zyl sulfonic acid.- Introduce while stirring one (1) part of the sodium salt of this dinitro-benzyl sulfonic acid intoa solution of one (1) part of sulfur and three (3) parts of sodium sulfid in two (2) parts of water Whose temperature is between sixty and eighty degrees. Then raise the temperature to between one hundred and fifty (150) and two hundred (200) degrees, and maintain it so until the mass has become very nearly solid. Now cool this result and break it up into small lumps and again heat for p some time-say about one-half (a) hour--to a temperature between two hundred and twenty (220) and two hundred and forty (240) degrees. The product so obtained is a blackish brittle mass, which dissolves in water, giving a yellowish-brown solution, which solution may be employed in dyeing. This solution yields a precipitate with either common salt or hydrochloric acid. With concentrated sulfuric acid a brown color is produced. Fabric which has been dyed with the product of this example when subjected to the treatment usual in similar cases with bichromate of potash and acetic acid is not cssentiallyaffected in shade or in fastness. The coloring-matter which is on the fiber which has been dyed with the product of this example may be diazotized, and the diazo product so resulting may be treated, as is usual in such operations for developing color on dyed fabric, with an alkaline solution of betaamphthol, and then the shades become more reddish.

\Vhen working with para-[nononitro-benzyl sulfonic acid or a mixture of this acid and Mohrs dinitro-benzyl sulfonic acid these products in the form of their sodium salts may be employed, weight for weight, in the place of the one (1) part of the sodium salt of Mohrs dinitro-benzyl sulfonic acid of this example. The prod ucts so resulting have the properties hereinbefore set forth.

\Vhat I claim is-- 1. Process of making substantive cottoncoloring matter which consists in treating" a hereinbeforo defined nitro-benzyl sulfonic substance with sodium sulfid and sulfur.

2. Process of making substantive cottoncoloring, matter which consists in treating the sodium salt of dinitrobenzyl sulfonic acid with sodium sulfid and sulfur.

3. As a new article of manufacture sulfurized substantive cotton-coloring. matter which can be obtained by treating a hereinbeforedefined nitro-benzyl sulfonic substance with sodium sulfid and sulfur, whose hereinbeforedefined coloring-matter acid is not dissolved by cold ten (10) per cent. carbonate-of-soda solution and one (1) part of which coloringmatter acid is not wholly dissolved within one (1) hour by ten (10) parts of an aqueous solution of crystallized sodium sulfid, one hundred (100) cubic centimeters of which 0011- tain fifty (50) grains of crystallized sodium sulfid, which coloring-matter dyes unmordanted cotton shades which are within the range of brown to yellow, and which shades are not essentially affected by bichrornate of potash and acetic acid, and which shades on suitable treatment with nitrous acid and betanaphthol become reddish.

4:. As a new article of manufacture sulfurized substantive cotton-coloring matter which can be obtained by treating the sodium salt of Mohrs dinitro-benzyl sulfonic acid with sodium sulfid and sulfur, whose hereinbeforedefined coloring-matter acid is insoluble in a cold ten (10) per cent. solution of carbonate of soda and one (1) part of which coloringmatter acid is not wholly dissolved within one (1) hour by ten (l0) parts of an aqueous so lution of crystallized sodium sulfid one hundred (100) cubic centimeters of which contain fifty (50) grams of crystallized sodium sulfid, and which coloring-matter dyes unmordanted cotton a brown shade which shade is practically not affected by bichromate of potash and acetic acid, and which shade on suitable treatment with nitrous acid and beta-naphthol becomes of a reddish cast.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LOUIS arms.

\Vitnesses:

BERNHARD O. HEssE, JACOB ADRIAN. 

